Effect of Various Levels of N and P on Yield and Yield Components of Maize

摘要

In order to study the effect of various levels of N and P (applied alone or in combinations) on maize, an experiment was conducted at Malakandher Research Farms, NWFP Agricultural University, Peshawar, Pakistan during 1997. Statistical analysis of the data revealed that different levels of nitrogen and phosphorus had a significant effect on plant height, number of rows cob^-1, thousand grains weight, shelling percentage, barrenness percentage, number of grains cob^-1, number of cobs plant^-1 and grain yield . Taller plants were attained by those plots, which received nitrogen and phosphorus in 150.60 kg ha^-1 ratio. Similarly, plots treated with fertilizer combination of 150:90 NP kg ha^-1 resulted in maximum, number of rows cob^-1 (16.00), maximum number of cobs plant^-1 (2.00) and maximum grain yield (3841.35 kg ha^-1).